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Title: Lifetime Measurement of the 2 1 + State in C 20

Abstract

Establishing how and when large N/Z values require modified or new theoretical tools is a major quest in nuclear physics. Here we report the first measurement of the lifetime of the 2{sup +}{sub 1} state in the near-dripline nucleus {sup 20}C. The deduced value of {tau}{sub 2{sup +}{sub 1}} = 9.8 ± 2.8(stat){sup +0.5}{sub -1.1}(syst) ps gives a reduced transition probability of B(E2;2{sup +}{sub 1}{yields}0{sup +}{sub g.s.}) = 7.5{sup +3.0}{sub -1.7}(stat){sup +1.0}{sub -0.4}(syst) e{sup 2}fm{sup 4} in good agreement with a shell model calculation using isospin-dependent effective charges.

Authors:
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Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
Nuclear Science Division
OSTI Identifier:
1050835
Report Number(s):
LBNL-5032E
Journal ID: ISSN 0031-9007; PRLTAO
DOE Contract Number:  
DE-AC02-05CH11231
Resource Type:
Journal Article
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 107; Journal Issue: 10; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; structure of carbon isotopes, isotopes, carbon, nuclear structure, nuclear properties, neutrons, protons, lifetime measurement

Citation Formats

Petri, M., Fallon, P., Macchiavelli, A. O., Paschalis, S., Starosta, K., Baugher, T., Bazin, D., Cartegni, L., Clark, R. M., Crawford, H. L., Cromaz, M., Dewald, A., Gade, A., Grinyer, G. F., Gros, S., Hackstein, M., Jeppesen, H. B., Lee, I. Y., McDaniel, S., Miller, D., Rajabali, M. M., Ratkiewicz, A., Rother, W., Voss, P., Walsh, K. A., Weisshaar, D., Wiedeking, M., and Brown, B. A. Lifetime Measurement of the 21+ State in C20. United States: N. p., 2011. Web. doi:10.1103/PhysRevLett.107.102501.
Petri, M., Fallon, P., Macchiavelli, A. O., Paschalis, S., Starosta, K., Baugher, T., Bazin, D., Cartegni, L., Clark, R. M., Crawford, H. L., Cromaz, M., Dewald, A., Gade, A., Grinyer, G. F., Gros, S., Hackstein, M., Jeppesen, H. B., Lee, I. Y., McDaniel, S., Miller, D., Rajabali, M. M., Ratkiewicz, A., Rother, W., Voss, P., Walsh, K. A., Weisshaar, D., Wiedeking, M., & Brown, B. A. Lifetime Measurement of the 21+ State in C20. United States. doi:10.1103/PhysRevLett.107.102501.
Petri, M., Fallon, P., Macchiavelli, A. O., Paschalis, S., Starosta, K., Baugher, T., Bazin, D., Cartegni, L., Clark, R. M., Crawford, H. L., Cromaz, M., Dewald, A., Gade, A., Grinyer, G. F., Gros, S., Hackstein, M., Jeppesen, H. B., Lee, I. Y., McDaniel, S., Miller, D., Rajabali, M. M., Ratkiewicz, A., Rother, W., Voss, P., Walsh, K. A., Weisshaar, D., Wiedeking, M., and Brown, B. A. Mon . "Lifetime Measurement of the 21+ State in C20". United States. doi:10.1103/PhysRevLett.107.102501. https://www.osti.gov/servlets/purl/1050835.
@article{osti_1050835,
title = {Lifetime Measurement of the 21+ State in C20},
author = {Petri, M. and Fallon, P. and Macchiavelli, A. O. and Paschalis, S. and Starosta, K. and Baugher, T. and Bazin, D. and Cartegni, L. and Clark, R. M. and Crawford, H. L. and Cromaz, M. and Dewald, A. and Gade, A. and Grinyer, G. F. and Gros, S. and Hackstein, M. and Jeppesen, H. B. and Lee, I. Y. and McDaniel, S. and Miller, D. and Rajabali, M. M. and Ratkiewicz, A. and Rother, W. and Voss, P. and Walsh, K. A. and Weisshaar, D. and Wiedeking, M. and Brown, B. A.},
abstractNote = {Establishing how and when large N/Z values require modified or new theoretical tools is a major quest in nuclear physics. Here we report the first measurement of the lifetime of the 2{sup +}{sub 1} state in the near-dripline nucleus {sup 20}C. The deduced value of {tau}{sub 2{sup +}{sub 1}} = 9.8 ± 2.8(stat){sup +0.5}{sub -1.1}(syst) ps gives a reduced transition probability of B(E2;2{sup +}{sub 1}{yields}0{sup +}{sub g.s.}) = 7.5{sup +3.0}{sub -1.7}(stat){sup +1.0}{sub -0.4}(syst) e{sup 2}fm{sup 4} in good agreement with a shell model calculation using isospin-dependent effective charges.},
doi = {10.1103/PhysRevLett.107.102501},
journal = {Physical Review Letters},
issn = {0031-9007},
number = 10,
volume = 107,
place = {United States},
year = {2011},
month = {8}
}